Solar Roof-Ventilating Device

ABSTRACT

A solar roof-ventilating device for compulsorily generating the flow of indoor and outdoor air includes a hollow ventilating casing provided on the roof to communicate the inside and outside of the roof with each other. The interior of the ventilating casing is provided with a heat dissipator constituted of a plurality of heat-dissipating pieces. A plurality of heat-conducting pipes penetrates through the heat dissipator. The other end of the heat-conducting pipe is connected to a heat-absorbing plate made of heat-absorbing materials. The front of the heat-absorbing plate is coated with a layer of black coating to facilitate the heat-absorbing speed of the heat-absorbing plate. Therefore, after the heat-absorbing plate has absorbed the solar energy, the heat can be conducted to the heat dissipator via the heat-conducting pipe. In this way, the temperature of the heat dissipator increases to generate a rising hot air, thereby to compulsorily cause the flow of the indoor air and achieve the ventilating effect.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a ventilating device, and in particular to a non-powered ventilating device provided on the roof.

2. Description of Prior Art

Since the weather in summer is extremely hot, it is an important issue to reduce the influence caused by the hot weather on our life. With the progress of technology, some convenient devices such as electric fan and air conditioner can provide us a cool and comfortable indoor environment in summer. However, the closed environment in air-conditioning operation adversely brings us additional problems, such as high power consumption and influence on health. Therefore, it is necessary to use a natural way to overcome the problem that the indoor environment is sultry due to the boiling hot weather.

In general buildings, the natural way of ventilating is to use the door and window as the paths of airflow. However, in view of confidentiality and safety, the door and window should be closed, which adversely affects or impede the flow of air. Since the hot air can rise, even though the door and window are opened, the hot air will still stay in the top of the building due to the orientation of the building, which causes the indoor environment sultry and poor ventilation. Especially, it is necessary for a common plant to have good ventilation. Since the indoor environment of the plant is much wider than that of a common house, general doors and windows in the plant cannot satisfy the demand for the ventilation and heat dissipation. Therefore, it is a common way of facilitating the flow of air to additionally mount air-extracting apparatuses on the doors and windows. On the other hand, these air-extracting apparatuses consume a lot of energy and thus substantially increase the cost. Although spraying water on the roof is a feasible way of reducing the temperature of indoor air, the heat-dissipating effect thereof is limited. Further, such solution consumes too much energy and water.

Therefore, in order to generate a good indoor environment and reduce the cost, a solution of providing the windows and doors on the roof to exhaust the hot air collected in the roof is proposed. Although providing the windows and doors directly on the roof is convenient in exhausting the hot air, unfortunately, it makes the roof unshielded and thus exposed to the sun and rain. If a canopy is additionally provided, the ventilating effect will be inevitably affected. Therefore, a conventional art discloses a non-powered turbine-based ventilating device 10 provided on the roof. As shown in FIG. 1, the ventilating device 10 is constituted of a plurality of blades 101 to form a spherical shape. The ventilating device 10 is disposed on a cover 102. The cover 102 is provided on the roof to communicate the indoor and outdoor environments with each other. By using the phenomenon that hot air can rise and providing airflow paths in the roof, the hot air collected beneath the roof can be exhausted to generate the flow of air. The blades 101 are designed as segments of a melon, so that they can rotate under the blowing of outdoor wind to thereby facilitate the communication of indoor air with outdoor air. In this way, the heat-dissipating effect can be achieved.

However, in the above-mentioned design, it utilizes the difference in temperature between the indoor and outdoor air to generate the flow of hot air. In addition, with the outdoor wind blowing the blades 101 of the ventilating device 10, the flow of air can be facilitated. Therefore, such solution is a passive way to generate the airflow. The key factor about whether the ventilating device 10 operates smoothly or not is the difference in temperature between the indoor and outdoor air. If the difference in temperature between the indoor and outdoor air is not large enough, or the outdoor temperature is higher than the indoor temperature, a compulsory airflow cannot be generated. As a result, the device 10 cannot perform a satisfactory ventilating effect. Further, if there is no wind in the outdoor environment, the blades 101 cannot rotate for lack of power. As a result, the turbine-based ventilating device 10 cannot generate a ventilating effect. Therefore, there is still much room for improvement.

SUMMARY OF THE INVENTION

In view of the above drawbacks, the present invention is to provide a solar roof-ventilating device, which is capable of compulsorily generating the communication between the indoor and outdoor air. The solar energy is conducted to a heat dissipator formed of a plurality of heat-dissipating pieces via heat-conducting pipes, thereby to increase the temperature of the heat dissipator. Then, the heat dissipator performs the heat exchange with the surrounding cool air to generate hot air, thereby to dissipate the heat. By using the phenomenon that hot air rises, the indoor air can be compulsorily caused to flow, thereby to achieve the ventilating effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a conventional art;

FIG. 2 is a perspective view showing the structure of the present invention;

FIG. 3 is a schematic view showing the operation of the present invention;

FIG. 4 is a top view showing the structure of another embodiment of the present invention;

FIG. 5 is a schematic view showing the assembly of the heat-conducting pipe of the present invention;

FIG. 6 is a schematic view showing the operation of another embodiment of the present invention; and

FIG. 7 is a schematic view showing the operation of still another embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

With reference to FIG. 2, it is a perspective view showing the structure of the present invention. The present invention provides a solar roof-ventilating device 1, which comprises a ventilating casing 11, a heat dissipator 12, at least one heat-conducting pipes 13 (four in the drawing), and a heat-absorbing plate 14. The ventilating casing 11 is a rectangular hollow casing and provided on the roof 2 as shown in FIG. 3, thereby to allow the communication between the indoor and outdoor air. The interior of the ventilating casing 11 is provided with a heat dissipator 12 constituted of a plurality of heat-dissipating pieces 121. A gap is formed between each heat-dissipating piece 121 to serve as a vertical heat-dissipating path within the ventilating casing 11. The plurality of heat-dissipating pieces 121 is made of metallic materials having high heat-dissipating phenomenon, such as copper and aluminum. The plurality of heat-dissipating pieces 121 can be formed into a rectangular shape or other suitable shape. In the present embodiment, the heat-conducting pipe 13 is a hollow closed pipe and can be a heat pipe or cool water pipe. The heat-conducting pipe 13 has a heat-dissipating end 131 and a heat-absorbing end 132. The heat-dissipating end 131 is formed into a U-lettered shape with its parallel portions penetrating through the ventilating casing 11 and the heat dissipator 12. Further, the heat-absorbing plate 14 is laid at a position for absorbing the solar energy easily and formed into a plate body of suitable shape. In the present embodiment, the heat-absorbing plate 14 is a rectangular plate body and made of materials having high heat conductivity, such as copper, aluminum, iron or carbon. The heat-absorbing plate 14 is connected to the heat-absorbing end 132 of the heat-conducting pipe 13. The heat-absorbing plate 14 has a heat-absorbing surface 141, which is the front thereof and faces to the sunshine. The heat-absorbing surface 141 is coated with a layer of black material (such as black coating) to facilitate the absorption of the heat source.

With reference to FIG. 3, it is a schematic view showing the operation of the present invention. In the solar roof-ventilating device 1, the ventilating casing 11 and the heat dissipator 12 within the ventilating casing 11 are provided on the roof 2, so that the space inside and outside the roof 2 can be communicated with each other. The heat-absorbing plate 14 is laid on one side of the roof 2. Further, the heat-dissipating end 131 of the heat-conducting pipe 13 penetrates through the ventilating casing 11 and the heat dissipator 12. The heat-absorbing end 132 of the heat-conducting pipe 13 is connected onto the heat-absorbing plate 14. Thus, when the large-area heat-absorbing plate 14 absorbs the solar energy to a certain amount of heat, the heat will be absorbed by the heat-absorbing end 132 of the heat-conducting pipe 13 and conducted to the heat-dissipating end 131, thereby to uniformly dissipate the heat to the heat dissipator 12 connected with the heat-dissipating end 131. Finally, the heat is dissipated by each heat-dissipating piece 121 of the heat dissipator 12 to form a great amount of hot air. The thus-generated hot air rises along the vertical heat-dissipating path formed between each heat-dissipating piece 121, which causes the circulation of the air inside the ventilating casing 11 and 1 turn the hot air collected beneath the roof 2 to flow outwardly. In this way, the indoor and outdoor air can be compulsorily flowed, thereby to generate the ventilating effect and relieve the sultry indoor environment.

With reference to FIG. 4, it is a top view showing the structure of another embodiment of the present invention. The heat-dissipating ends 131 of the plurality of heat-conducting pipes 13 provided within the ventilating casing 11 and the heat dissipator 12 can be arranged at intervals to penetrate through the ventilating casing 11 and the heat dissipator 12. Further, the heat-absorbing ends 132 a and 132 c of the heat-conducting pipes 13 a and 13 c extend toward the right side of the heat dissipator 12 to connect to a heat-absorbing plate 14 a. The heat-absorbing ends 132 b and 132 d of the heat-conducting pipes 13 b and 13 d extend toward the left side of the heat dissipator 12 to connect to another heat-absorbing plate 14 b. Further, the arrangement of the heat-conducting pipes 13 can be implemented in a stacking manner shown in FIG. 5 to penetrate through the heat dissipator 12 and extend to both sides to connect with the heat-absorbing plates 14 a and 14 b.

With reference to FIG. 6, it is a schematic view showing the operation of another embodiment of the present invention. When the solar roof-ventilating device 1 is mounted on the roof 2, the air inside and outside the roof 2 can be communicated with each other. The heat-absorbing plates 14 a and 14 b are laid respectively on both sides of the roof 2 and coated with a layer of black coating, so that the heat-absorbing plates 14 a and 14 b can rapidly absorb the solar energy. After the heat-absorbing plates 14 a and 14 b absorb heat to a certain amount, the heat can be conducted to the heat dissipator 12 via the connected heat-conducting pipes 13. The heat dissipator 12 dissipates the heat to generate hot air. By using the phenomenon that hot air rises, the hot air can rise along the heat-dissipating paths formed between each heat-dissipating piece 121 to dissipate outwardly, thereby to compulsorily cause the flow of air inside and outside the roof 2. As a result, the hot air inside the roof 2 can be exhausted outwardly, thereby to generate a ventilating effect.

With reference to FIG. 7, it shows another embodiment of the present invention. It can be seen that a covering piece 3 covers on the heat-absorbing ends 132 of the heat-conducting pipes 13 connected with the heat-absorbing plate 14. The covering piece 3 is formed into an Ω-lettered shape to increase the surface area for absorbing heat and made of materials having high heat conductivity, such as copper, aluminum, iron or carbon. The heat is absorbed by the heat-absorbing end 132 and then conducted to the heat dissipator 12, thereby to increase the heat-dissipating effect of the present invention.

Although the present invention has been described with reference to the foregoing preferred embodiments, it will be understood that the invention is not limited to the details thereof. Various equivalent variations and modifications can still be occurred to those skilled in this art in view of the teachings of the present invention. Thus, all such variations and equivalent modifications are also embraced within the scope of the invention as defined in the appended claims. 

1. A solar roof-ventilating device, comprising: a ventilating casing being a hollow casing and mounted on the roof for communicating the indoor and outdoor environments; a heat dissipator provided within the ventilating casing; a heat-conducting pipe having a heat-dissipating end and a heat-absorbing end, the heat-dissipating end of the heat-conducting pipe penetrating through the heat dissipator; and a heat-absorbing plate connected to the heat-absorbing end of the heat-conducting pipe.
 2. The solar roof-ventilating device according to claim 1, wherein the heat dissipater is constituted of a plurality of heat-dissipating pieces.
 3. The solar roof-ventilating device according to claim 2, wherein the heat-dissipating piece is made of any one of copper, aluminum, iron or carbon.
 4. The solar roof-ventilating device according to claim 1, wherein the heat-conducting pipe is either a heat pipe or a cool water pipe.
 5. The solar roof-ventilating device according to claim 1, wherein a covering piece covers on the heat-absorbing end.
 6. The solar roof-ventilating device according to claim 5, wherein the covering piece is formed into a Ω-lettered shape to cover on the heat-absorbing end.
 7. The solar roof-ventilating device according to claim 5, wherein the covering piece is 20 made of any one of copper, aluminum, iron or carbon
 8. The solar roof-ventilating device according to claim 1, wherein the heat-conducting pipe is formed into a U-lettered shape to penetrate through the heat dissipator.
 9. The solar roof-ventilating device according to claim 1, wherein the heat-conducting pipes are arranged at intervals to penetrate through the heat dissipator.
 10. The solar roof-ventilating device according to claim 1, wherein the heat-conducting pipes are stacked to penetrate through the heat dissipator.
 11. The solar roof-ventilating device according to claim 1, wherein the heat-absorbing plate is made of a heat-conducting material.
 12. The solar roof-ventilating device according to claim 1, wherein the heat-absorbing plate is made of any one of copper, aluminum, iron or carbon
 13. The solar roof-ventilating device according to claim 1, wherein the heat-absorbing plate has a heat-absorbing surface.
 14. The solar roof-ventilating device according to claim 13, wherein the heat-absorbing surface is coated with a layer of black material.
 15. The solar roof-ventilating device according to claim 13, wherein the heat-absorbing surface is coated with a black coating. 